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(No Model.) 2 Sheets-Sheet 1.

J. SHERMAN.

GEAR CUTTING MACHINE. No.- 464,233.

Patented Deo. 1,1891.

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J SHERMAN GEAR CUTTING MACHINE.

No. 464,233. Patented Deo. 1., 1891.

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UNITED STATES i PATENTd OFFICE.

JOHN SHERMAN, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO LOUIS SMITH, OF SAME PLACE.

GEAR-'CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 464,233, dated December 1, 1891.

Application filed July 13,71 89 l.

To a/ZZ whom it may concern:

Be it known that I, JOHN SHERMAN, a citizen of the United States, and a'resident of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Gear-Cutting Machines, of which the following is a specification.

.This invention relates to machines for cutting gear-teeth; and it consists in the novel construction and combinations of parts, as hereinafter fully described, and pointed out in the claims.

In the accompanying'drawings, Figure 1 is a front side elevation. Fig. 2 is a reverse side elevation. Fig. 3 is a front end elevation. Fig. 4 is a rear end elevation. Fig. 5 is a top' or plan view. Fig. 6 is a sectional view of the clutch. Fig. 7 is a side view of a latch-stop mechanism. Fig. 8 is a transverse sectional view of same.

A represents a standard and base, which supports all the working part-s of the machine.

B is a vertically-adjustable table attached to one end of said standard by means of a dovetail groove and slide b. To the under side of the table is provided a horizontal shaft B2, xed to turn in hangers b2, to the inner end of which is attached a bevel-gear b3.

B3 is a hollow internally-screw-threaded post secured to the base iiange of support A, and B4 is a vertical screw playing in said post, whose upper end is fixed in a socketin the under side of the table. It is also provided with a bevel-gear b4, meshing with the aforef said gear b2. By means of a crank on the outer end of shaft B2 the said table may be elevated or depressed for adjustment to accommodate it to the size of wheel being cu't. To the top` of the standard a frame C is attached provided with a work-holding shaft C2, and above this is provided a parallel bar C2, provided with a removable hanger C4, employed for supporting the end of the shaft C2, projecting over the table B.- The said shaft C2 is employed for holding the wheels to be cut, as shown in dotted lines in Fig. 1, the shaft having a shoulder c, against which the blank wheels rest and are held by a nut c2 on the shaft. The rear end of the shaft C2 is serai No. 399,296. (No model.)

t provided with a large worm gear-wheel C5, re-

fer-red to later on. `Upon the table B is provided a sliding tool-holding bed D, having a dovetail groove riding on dovetail slides d d on said table. The bed D is made to travel back and forth by means of a screw E, play--y ing in a'nut. on the under side of said bed D.

On the bed D is provided a tool-holding shaft visible) set in suitable bearings and having a pinionf meshing with said Wheel E3, and upon which is fixed the driviugpulley F. Upon the said invisible shaft is also suspended `a swinging arm F2, carrying a train of gearlwheels F3 F4. 4 I On the shaft of the lower gear is provided a cone-pulley G. Near the outerend of the table B is provided a shaft Il, journaled in bearings h h, and it has a Wormscrew, which turns the screw E through the medium of the worm-gear E4 on said screw E, by which the traversing bed D is propelled. On the said shaft H is also placed a gearwheel H and also a cone-pulley G2, to be connected by belt with pulley G for transmitting motion thereto. 4

G3- is a quadrant-arm connected With'the shaft of lower-cone pulley, and it is also connected by a screw-rod G4 with the shaft of upper-cone pulley G2. Said screw-rod is also provided with jam-nuts g g2 for fastening the rodin the sockets on the shaft and quadrant, by which also adjustment may be made for giving proper tension to the belt on the cone pulleys. Upon the top corner of table B is also provided a short shaft having a gear I meshing with the gear H2, and onits opposite end is provided a bevel pinion-gear I2, which meshes with a bevel-gear-I3 on a screw I4, Fig. 6, loosely placed on the outer end of screwshaft E and within the bearing on the end of the table B. The clutch mechanism on said shaft E comprises one of the novel fea'- tures of my invention, described as follows:

The said screw-shaft E has an enlargement IOO E2 and the bevel-gearls. Upon the enlargement E4X is placed a sliding clutch-sleeve J, secured bya pin j enteringaslot in the shaft, which allows it to have short longitudinal movement while rotating with the shaft. A ring is fitted to the groove in the periphery of the sleeve J and is pivoted in the yoke 7a on the lever K, which lever is fulcrumed onto the table B. On the side of the traversing bed D is fixed a push pin or arm d2, and on the side of the table B is attached a sliding rod L, set to slide in bearings Z Z on the' side of the table. This rod is pivotally attached Yto the clutch-lever K for actuating the same, as hereinafter shown. On the rod L are Xed adjustable stops Z2 Z2, against which the arm CZ2 strikes in the movements of the bed. the rear end ofthe standard A is attached a bracket M, supporting a worm-screw mechanisin for intermittently actuating the feedwheel C5, by means of which the blank wheel being cut is turned for cutting the teeth in succession. This comprises the second novel feature of my invention and is described as follows. v

N is a shaft set in bearings in the bracket M, having pinion-teeth n, and is provided with driving-pulley O.

P is a worm-screw shaft, also having its bearings in the said bracket, and lies parallel with shaft N, with its worm-screw in mesh with the teeth of large feed-wheel C5.

Q is a third shaft journaled below the shaft N, and is connected by gear g g with the applied to the said feed-wheel C5.

worm-screw shaft P. On the other end 'of shaft Q is provided a friction-gear mechanism by Which an intermittent movement is R is a wheel upon said shaft Q, having a sleeve upon which is placed a gear-wheel R2 loosely, so that it may turn thereon. In one face of said wheel R2 are made recesses in which are placed springs s s, bearing against a disk r on I the outer end of the shaft; held by jam-nuts r2,

by which also the tension of the springs may be regulated. In one side of the wheel R is made a notch, (seen in Fig. 7,) with which a pawl T engages t0 prevent the Wheel and its shaft from turning.`

U is a lever pivoted bythe side of the pawl and provided with a hook u, engaging with a shoulder or lug on the pawl. The lever U is connected by a chain V with the traversing tool-bed D, by means of which,when the said tool-bed has moved back in its return movements, will pull on the lever U and lift the pawl out of the notch in the Wheel R. 'Then YJ(he said wheel, being free to move, will be turned by the friction-bearing of the Wheel R2 against it, and thereby turn the shaft Q,

and through it and the gears q q impart a mo-` Onk tion to the worm-shaft, and thus move the feed-wheel C5. A pin or lug X is provided on the side supporf,which as theleverU is pulled over causes the hook u to be raised, it having an incline on its under side, which rides on the said pin or lug for the purposeof raising it. This releases the hook from the pawl and lets it drop back again, so as to catch in the notch again and stop the revolution of thesaid wheel and shaft until the aforesaid tool-bed again makes its return movement, which will repeat this operation.

Having described my invention, I claim-f l. The combination, with screw E, having enlargement E, of loose clutch-sleeves I4 I5, worm-gear E2X, keyed onto said sleeve l4,worm

screw shaft H, meshing with said gear E2X,

and cone-pulley G2 for giving rotary motion to said screw E, the cone-pulley G and thev quadrant-arm connecting the shafts of the said pulleys, substantially as and for the purpose specified.

2. The combination of screw E, having enlargement EM, loose clutch-sleeves I4 I5, gear E, and bevel-gearP, keyed onto said sleeves, clutch-sleeve J, mounted on said enlargement, and means for shifting said clutch-sleeve, worm-screw shaft H, and the connected conepulleys, gear H2, gear and short shaft I, and bevel-pinion meshingwith said bevel-gear I3, arranged to operate in the manner and for the purpose specified.

3. The combination, with the feed-wheel C5 and Worm-screw shaft P, of shaft Q, each journaled in the bracket M and connected to revolve in conjunction by gears q q, wheel R, mounted on said shaft Q and having'the friction gear-wheel R, mounted on the hub of said Wheel R, said gear having recesses and springs s s, bearing-plate r, jam-nuts r2, the shaft N, having gear-teeth n meshing with said friction-gear R2, and pulley O, mounted on said shaft N, all arranged to operate sub-` stantially as and for the purpose specified.

4. The combination,with feed-wheel C5 and wormshaft P, of shaft Q, each journaled in the bracket M and connected to revolve in conjunction by gear q q, wheel R, mounted on shaft Q and having a notch, of the stop pawl T, lever U, having hook u, and means for operating said lever, hook, and pawl, substantially as described, for releasing said wheel R, whereby intermittent revolving movements are imparted to said feed-wheel C5 through the medium of the friction-gear R2, substantially as and for the purpose specified.

JOHN SHERMAN. Witnesses:

GEO. W. rlIBBIrTs, LoUrs SMITH.

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